cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A263886 Number of permutations of [n] containing exactly two occurrences of the consecutive pattern 132.

Table of values

n a(n)
5 3
6 56
7 753
8 9024
9 104814
10 1228608
11 14824314
12 185991936
13 2438459325
14 33476112000
15 481470208575
16 7252002478080
17 114295913943660
18 1882806417303552
19 32377593994012260
20 580478495476948992
21 10835925949596420135
22 210343353555466229760
23 4240673559279540077085

List of values

[3, 56, 753, 9024, 104814, 1228608, 14824314, 185991936, 2438459325, 33476112000, 481470208575, 7252002478080, 114295913943660, 1882806417303552, 32377593994012260, 580478495476948992, 10835925949596420135, 210343353555466229760, 4240673559279540077085]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.